MongoDB C100DBA Exam Practice Test Instant Access

Question 1

Which of the following is supported by MongoDB?

ATransaction Management

BACID Transactions

CJournaling

DRelationships between Collections (Primary Key Foreign Key)

Answer : C

Question 2

Which of the following does MongoDB use to provide High Availability and fault tolerance?

ASharding

BIndexing

CReplication

DWrite Concern

Answer : C

Question 3

Which of the following node is used during election in a replication cluster?

Aprimary

Barbiter

Chidden

Dsecondary

Answer : B

Question 4

Which of the following index would be optimum for the query?

Select all valid. db.test.find( { a : 5, c : 2 })

Adb.test.ensurelndex( { c:l, a: 1})

Bdb.test.ensurelndex( { a : 1, c: 1, d: 1, b : 1})

CCH db.test.ensurelndex( { a :1, c:l})

Ddb.test.ensurelndex( { a: 1, b :1, c:l, d:l})

Answer : B, C

Question 5

Mongodb does provide high availability via which option?

AReplication

BIndexing

CSharding

DJournaling

Answer : A

Question 6

Consider that our posts collection contains an array field called tags that contains tags that the user enters. {

Which of the following commands will find all the posts that have been tagged as tutorial.

Adb.posts.find( { tags : ['tutorial'] } );

Bdb.posts.find( { $array : {tags: 'tutorial') > );

Cdb.posts.find( { tags : 'tutorial' } );

Ddb.posts.findInArray( { tags : 'tutorial' > );

Answer : C

Question 7

In a replica set, a_________number of members ensures that the replica set is always able to select a primary.

AEven

BOdd

DDepends on the application architecture

Answer : B

MongoDB C100DBA MongoDB Certified DBA Associate Exam Practice Test